Rugose squat lobster (Munida rugosa)

Distribution data supplied by the Ocean Biodiversity Information System (OBIS). To interrogate UK data visit the NBN Atlas.Map Help



A squat lobster up to 10 cm with abdomen extended. Abdomen usually held under the thorax. Orange to reddish brown in colour with darker transverse striations on the carapace and abdomen. The tips and spines on the claws are white.

Recorded distribution in Britain and Ireland

All British and Irish coasts.

Global distribution



Common in shallow water where it lives on rock ledges, excavations in sand under boulders and on rock ledges (Sue Scott, pers. comm.). Also found in deeper water (50- 150 m) on sandy or soft substrata.

Depth range


Identifying features

  • Antennae not quite as long as the pincer bearing legs.
  • Pincers are very long and thin with numerous spines.
  • Numerous uninterrupted dark transverse stripes on the orange / brown carapace.
  • No spines on fourth abdominal segment.
  • Fifth pair of walking legs long and thin, usually held underneath the margins of the carapace.

Additional information

Also known as plated lobster and squat lobster.


  1. Campbell, A., 1994. Seashores and shallow seas of Britain and Europe. London: Hamlyn.

  2. Howson, C.M. & Picton, B.E., 1997. The species directory of the marine fauna and flora of the British Isles and surrounding seas. Belfast: Ulster Museum. [Ulster Museum publication, no. 276.]

  3. Ingle, R., 1997. Crayfishes, lobsters and crabs of Europe. An illustrated guide to common and traded species. London: Chapman and Hall.


  1. Centre for Environmental Data and Recording, 2018. Ulster Museum Marine Surveys of Northern Ireland Coastal Waters. Occurrence dataset accessed via on 2018-09-25.

  2. Environmental Records Information Centre North East, 2018. ERIC NE Combined dataset to 2017. Occurrence dataset: accessed via on 2018-09-38

  3. National Trust, 2017. National Trust Species Records. Occurrence dataset: accessed via on 2018-10-01.

  4. NBN (National Biodiversity Network) Atlas. Available from:

  5. OBIS (Ocean Biodiversity Information System),  2024. Global map of species distribution using gridded data. Available from: Ocean Biogeographic Information System. Accessed: 2024-05-23


This review can be cited as:

Jackson, A. 2008. Munida rugosa Rugose squat lobster. In Tyler-Walters H. and Hiscock K. Marine Life Information Network: Biology and Sensitivity Key Information Reviews, [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 23-05-2024]. Available from:

Last Updated: 24/04/2008